cryptix.java
来自「jpeg2000编解码」· Java 代码 · 共 151 行
JAVA
151 行
// $Id: Cryptix.java,v 1.1.1.1 2002/08/27 12:32:09 grosbois Exp $//// $Log: Cryptix.java,v $// Revision 1.1.1.1 2002/08/27 12:32:09 grosbois// Add cryptix 3.2//// Revision 1.7 1999/07/21 02:39:30 edwin// Removing workaround as it reveals another bug in the JDK.//// Revision 1.6 1999/07/13 18:25:25 edwin// Workaround to prevent a buggy JDK from unloading java.security.Security which in turn unloads the Cryptix provider// This is a fix to: http://130.89.235.121/root/cryptix/old/cryptix/FAQ.html#bj_unloading//// Revision 1.5 1997/11/20 19:24:48 hopwood// + cryptix.util.* name changes.//// Revision 1.4.1 1997/11/15 David Hopwood// + Sorted out trivial conflicts between my version and Raif's.//// Revision 1.4 1997/11/10 07:31:32 raif// *** empty log message ***//// Revision 1.3 1997/11/05 08:01:56 raif// *** empty log message ***//// Revision 1.2 1997/11/04 19:33:30 raif// *** empty log message ***//// Revision 1.1.1.1 1997/11/03 22:36:56 hopwood// + Imported to CVS (tagged as 'start').//// Revision 0.1.0.0 1997/08/29 David Hopwood// + Original version.//// $Endlog$/* * Copyright (c) 1997 Systemics Ltd * on behalf of the Cryptix Development Team. All rights reserved. */package cryptix.provider;import cryptix.CryptixProperties;import java.io.PrintWriter;import java.io.PrintStream;import java.io.OutputStream;import java.io.IOException;import java.util.Enumeration;import java.util.Properties;import java.security.Provider;/** * This class acts as a security provider for the Java Cryptography * Architecture. The mapping between cipher names and classes is stored * in the <samp>Cryptix.properties</samp> file (see * <a href=cryptix.CryptixProperties.html><samp>CryptixProperties</samp></a>). * <p> * SECURITY: In JavaSoft's version of JCE, Provider indirectly extends * Hashtable, which means that it would normally be possible to call * the <code>put</code>, <code>remove</code> or <code>clear</code> * methods to change properties without any security check (also the * <code>load</code> method from Properties). This is arguably a design * bug in JCA and/or the Properties class. * <p> * This class works around the potential security problem by not using * the Hashtable superclass. Instead it delegates to * <samp>CryptixProperties</samp>. * <p> * <b>Copyright</b> © 1997 * <a href="http://www.systemics.com/">Systemics Ltd</a> on behalf of the * <a href="http://www.systemics.com/docs/cryptix/">Cryptix Development Team</a>. * <br>All rights reserved. * <p> * <b>$Revision: 1.1.1.1 $</b> * @author David Hopwood * @author Jill Baker * @author Raif S. Naffah * @since Cryptix 2.2.2 */public class Cryptixextends Provider{// Constants//........................................................................... static final long serialVersionUID = 2535048358772783954L;// Constructor//........................................................................... /** Constructs a Cryptix security provider object. */ public Cryptix() { super("Cryptix", getVersionAsDouble(), // name, version "<html>\n" + // info "<head><title>" + CryptixProperties.getVersionString() + "</title></head>\n" + "<body>\n" + CryptixProperties.getHtmlInfo() + "</body>\n" + "</html>\n"); }// Own methods//........................................................................... /** * Returns the Cryptix version number as a double. Note that Cryptix * version numbers are not normally written as decimals, but as triples * of integers. However, we need a double to pass to the Provider * constructor. */ private static double getVersionAsDouble() { return CryptixProperties.getMajorVersion() + (double) CryptixProperties.getMinorVersion() / 100 + (double) CryptixProperties.getIntermediateVersion() / 10000; } public String toString() { return CryptixProperties.getVersionString(); }// Methods defined in java.util.Properties (excluding load, which is// deliberately not supported).//........................................................................... public void save(OutputStream os, String comment) { CryptixProperties.save(os, comment); } public String getProperty(String key) { return CryptixProperties.getProperty(key); } public String getProperty(String key, String defaultValue) { return CryptixProperties.getProperty(key, defaultValue); } public Enumeration propertyNames() { return CryptixProperties.propertyNames(); } public void list(PrintStream out) { CryptixProperties.list(out); } public void list(PrintWriter out) { CryptixProperties.list(out); }}⌨️ 快捷键说明
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